# A projectile of mass 0.268 kg is shot from a cannon, at height 6.8 m, as shown in the figure, with an initial velocity vi having a horizontal component of 6.4 m/s.

A projectile of mass 0.268 kg is shot from a cannon, at height 6.8 m, as shown in the figure, with an initial velocity vi having a horizontal component of 6.4 m/s. The projectile rises to a maximum height of ∆y above the end of the cannon’s barrel and strikes the ground a horizontal distance ∆x past the end of the cannon’s barrel.

Find the magnitude of the velocity vector when the projectile hits the ground. The acceleration of gravity is 9.8 m/s2 .

Answer in units of m/s.

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